Systems of Equations: Mixture Problems

A chemist needs 80 milliliters of a 20% acid solution. The chemist has 50 milliliters of a 15% acid solution. How many milliliters of a 50% acid solution should be added to obtain the desired solution?

• 100 milliliters

• 30 milliliters

• 10 milliliters

• 50 milliliters

Tags

CCSS.8.EE.C.7B

A grocer sells cashews for $8 per pound and peanuts for $4 per pound. The grocer wants to sell 100 pounds of mixed nuts for $5 per pound. How many pounds of each type of nut should the grocer use?

• The grocer should use 40 pounds of cashews and 60 pounds of peanuts.

• The grocer should use 30 pounds of cashews and 70 pounds of peanuts.

• The grocer should use 50 pounds of cashews and 50 pounds of peanuts.

• The grocer should use 25 pounds of cashews and 75 pounds of peanuts.

A chemist needs 90 milliliters of a 20% acid solution. The chemist has 50 milliliters of a 15% acid solution. How many milliliters of a 50% acid solution should be added to obtain the desired solution?

• 40

• 10

• 60

• 25

Tags

CCSS.8.EE.C.7B

A grocer sells cashews for $8 per pound and peanuts for $4 per pound. The grocer wants to sell 100 pounds of mixed nuts for $5 per pound. How many pounds of each type of nut should the grocer use?

• The grocer should use 60 pounds of cashews and 40 pounds of peanuts.

• The grocer should use 80 pounds of cashews and 20 pounds of peanuts.

• The grocer should use 50 pounds of cashews and 50 pounds of peanuts.

• The grocer should use 70 pounds of cashews and 30 pounds of peanuts.

A chemist needs 90 milliliters of a 20% acid solution. The chemist has 50 milliliters of a 15% acid solution. How many milliliters of a 50% acid solution should be added to obtain the desired solution?

• 40

• 60

• 30

• 75

Tags

CCSS.8.EE.C.7B

A grocer sells cashews for $8 per pound and peanuts for $4 per pound. The grocer wants to sell 100 pounds of mixed nuts for $5 per pound. How many pounds of each type of nut should the grocer use?

• The grocer should use 60 pounds of cashews and 40 pounds of peanuts.

• The grocer should use 70 pounds of cashews and 30 pounds of peanuts.

• The grocer should use 50 pounds of cashews and 50 pounds of peanuts.

• The grocer should use 80 pounds of cashews and 20 pounds of peanuts.

A chemist needs 90 milliliters of a 20% acid solution. The chemist has 50 milliliters of a 15% acid solution. How many milliliters of a 50% acid solution should be added to obtain the desired solution?

• 40

• 60

• 25

• 10

Tags

CCSS.8.EE.C.7B

A grocer sells cashews for $8 per pound and peanuts for $4 per pound. The grocer wants to sell 100 pounds of mixed nuts for $5 per pound. How many pounds of each type of nut should the grocer use?

• The grocer should use 80 pounds of cashews and 20 pounds of peanuts.

• The grocer should use 50 pounds of cashews and 50 pounds of peanuts.

• The grocer should use 70 pounds of cashews and 30 pounds of peanuts.

• The grocer should use 60 pounds of cashews and 40 pounds of peanuts.

A chemist needs 90 milliliters of a 20% acid solution. The chemist has 50 milliliters of a 15% acid solution. How many milliliters of a 50% acid solution should be added to obtain the desired solution?

• 25

• 40

• 75

• 60

Tags

CCSS.8.EE.C.7B

A grocer sells cashews for $8 per pound and peanuts for $4 per pound. The grocer wants to sell 100 pounds of mixed nuts for $5 per pound. How many pounds of each type of nut should the grocer use?

• The grocer should use 40 pounds of cashews and 60 pounds of peanuts.

• The grocer should use 50 pounds of cashews and 50 pounds of peanuts.

• The grocer should use 30 pounds of cashews and 70 pounds of peanuts.

• The grocer should use 25 pounds of cashews and 75 pounds of peanuts.

Tags

CCSS.8.EE.C.8C